NEET 2001 Biology question

Not in NEET syllabus

Which aquatic fern performs nitrogen fixation : -

(1)AzollaCorrect
(2)Nostoc
(3)Salvia
(4)Salvinia

Answer: (1)

Solution

Azolla is a free-floating aquatic heterosporous fern whose leaf cavities harbour the nitrogen-fixing cyanobacterium Anabaena azollae; it is used as a biofertiliser in rice

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Question ID VK-088915